Comparison between synthesis techniques to obtain ZnO nanorods and its effect on dye sensitized solar cells

Cakır, A. Cagatay; Erten-Ela, Şule

doi:10.1016/j.apt.2011.08.003

Cited by 32 publications

(6 citation statements)

References 29 publications

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“…There is a big interest in growing ZnO nanorods for their potential use in different applications such as dye sensitized solar cells [5,6], anti-reflective coatings (ARC) [7], chalcopyrite solar cells [8,9], light-emitting diodes [10], photo-catalysts [11][12][13], and gas sensing devices [14,15].…”

Section: Introductionmentioning

confidence: 99%

Water-resistant surfaces using zinc oxide structured nanorod arrays with switchable wetting property

Ennaceri

Wang

Erfurt

et al. 2016

Surface and Coatings Technology

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Abstract.This study presents an experimental approach for fabricating super-hydrophobic coatings based on a dual roughness structure composed of zinc oxide nanorod arrays coated with a sputtered zinc oxide nano-layer. The ZnO nanorod arrays were grown by mean of low-temperature electrochemical deposition technique (75°C) on FTO substrates with pre-sputtered ZnO seed layer of 30 nm thickness. The ZnO nanorods show a (002) orientation along the c-axis, and have a hexagonal structure, with an average length of 710 nm, and average width of 156 nm. On the other hand, the crystallite size of the top-coating sputtered ZnO layer is of 30 nm. The as-deposited ZnO nanorod arrays exhibited a hydrophobic behavior, with a surface water contact angle of 108°, whereas the dual-scale roughness ZnO nanorods coated with sputtered ZnO exhibited a superhydrophobic behavior, with a surface water contact angle of 157° and high water droplet adhesion. The photo-catalytic degradation of methylene blue in the presence of both the single roughness ZnO nanorod arrays, and dual roughness structured ZnO. The ZnO nanorod arrays showed good activity, with a degradation efficiency of 50% and a degradation constant of (k = 0.00225 min -1 ) after 5 hours of UV illumination. On the other hand, the ZnO dual roughness structure prepared by sputtered ZnO on top of the ZnO nanorod arrays showed minimal activity, with a degradation efficiency of 16% and a degradation constant of (k = 0.000586 min -1 ) after 5 hours of UV exposure. The double structured films exhibited high sensitivity to UV light, with a UV-induced switching behavior from super-hydrophobic to super-hydrophilic after only 30 minutes of UV exposure.Key Words: Super-hydrophobic, water contact angle, zinc oxide, nanorod arrays, rose petal effect, photo-catalysis. Highlights Hydrophobic ZnO nanorod arrays with high water-adhesion are achieved. Sputtered ZnO top-coating is used to reach super-hydrophobicity. Switchable wettability for ZnO single and dual roughness films under UV exposure. Strong pinning to the surface, similar to the rose-petal effect. The higher WCA is responsible for the decrease in the photo-catalysis activity.

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Section: Introductionmentioning

confidence: 99%

Water-resistant surfaces using zinc oxide structured nanorod arrays with switchable wetting property

Ennaceri

Wang

Erfurt

et al. 2016

Surface and Coatings Technology

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“…A multimode microwave heating system, operating at a frequency of 28 GHz, is utilized in order to induce rapid processing [45]. The synthesis of ZnO nanorods electrodes utilizing microwaves also demonstrated marked performance improvements [54].…”

Section: Microwave Irradiationmentioning

confidence: 99%

Research and Development Aspects on Chemical Preparation Techniques of Photoanodes for Dye Sensitized Solar Cells

Asim

Ahmadi

Alghoul

et al. 2014

International Journal of Photoenergy

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The importance of dye sensitized solar cells (DSSCs) as a low-cost and environmentally friendly photovoltaic (PV) technology has prompted many researchers to improve its efficiency and durability. The realization of these goals is impossible without taking into account the importance of the materials in DSSCs, so the focus on the preparation/deposition methods is essential. These methods can be either chemical or physical. In this study, the chemical applied methods that utilize chemical reaction to synthesize and deposit the materials are covered and categorized according to their gas phase and liquid phase precursors. Film processing techniques that can be used to enhance the materials' properties postpreparation are also included for further evaluation in this study. However, there is a variety of consideration, and certain criteria must be taken into account when selecting a specific deposition method, due to the fact that the fabrication conditions vary and are unoptimized.

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“…Nanocomposites play very important role in the field of nanoscience and nanotechnology for their potential application in the areas of optoelectronics, sensing, photocatalysis, mainly due to their unusual electrical and optical properties [1]. ZnO, CdO and SnO 2 are important class of oxides, and their nanostructures have been studied widely in optoelectronic and solar cell devices [2][3][4][5]. There are lots of researches reported on the nanocomposites of these materials synthesized by various physical and chemical techniques.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of CdO–SnO2 Nanocomposites Prepared by Hydrothermal Method

Sirohi

Kumar

Singh

et al. 2017

Acta Metall. Sin. (Engl. Lett.)

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In this work, (1-x)CdO-xSnO 2 nanocomposites (B 0.15) have been synthesized via hydrothermal route. The structural study reveals that CdO nanostructures possess crystalline phase and cubic structure. The CdO-SnO 2 nanocomposites possess both cubic and orthorhombic structure with good crystallinity. The crystallite size in the nanocomposites was found to be in the range of 9.6-19.6 nm. Field emission scanning electronic microscopy and highresolution tunnelling microscopy analysis confirm the presence of both cubic and orthorhombic structures which is also confirmed from X-ray diffraction studies. Fourier transform infrared spectroscopy (FTIR) studies confirm that CdO-SnO 2 nanocomposites possess the characteristics band of both CdO and SnO 2 nanostructures. The UV-visible absorption studies confirm that the optical absorption band in CdO-SnO 2 nanocomposites possesses both blue and red shift as compared to that of CdO nanostructures. Photoluminescence spectroscopy studies reveal the appearance of strong emission peak at 513, 469 and 369 nm corresponding to green, blue and violet emission spectrum, respectively, in CdO-SnO 2 nanocomposites. The FTIR studies confirm the presence of hydroxyl and water functional group due to atmospheric water vapours and chemical bonding in CdO and CdO-SnO 2 nanocomposites. Raman spectroscopy confirms the presence of Raman bands of both CdO and SnO 2 phases in the CdO-SnO 2 nanocomposites.

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Comparison between synthesis techniques to obtain ZnO nanorods and its effect on dye sensitized solar cells

Cited by 32 publications

References 29 publications

Water-resistant surfaces using zinc oxide structured nanorod arrays with switchable wetting property

Water-resistant surfaces using zinc oxide structured nanorod arrays with switchable wetting property

Research and Development Aspects on Chemical Preparation Techniques of Photoanodes for Dye Sensitized Solar Cells

Synthesis and Characterization of CdO–SnO2 Nanocomposites Prepared by Hydrothermal Method

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